ஒன்ஸ் அபான் ஏ டைம் இன் மெட்ராஸ்

In Chennai, along the Koovam River, 9-year-old Dinesh's life ends tragically when he's shot by retired army officer Krishnaraja in a fit of rage. Confusion ensues as the police investigation fails to identify the shooter. Krishnaraja disposes of the gun in the river, but its discoveries to few people sets off a chain of events with unforeseen consequences.